~600 km
Expected lifespan, estimated from its category and specs.

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Ideal for Neutral runners who want a highly cushioned, fun daily trainer for easy and steady miles, and who like a pronounced rocker and a bouncy ride without chasing race-day speed.
Daily Trainer shoes in NORMA's database last between 320 and 800 km across 694 models. At 600 km, the On Cloudmonster 3 sits in the upper half of that range.
The Cloudmonster 3 is On's max-cushioned neutral daily trainer, built to soak up everyday miles with a playful, forward-rolling ride. It pairs dual-density Helion foam with a triple-layer CloudTec setup and an aggressive rocker, plus a nylon-blend Speedboard that adds a bit of pop off the toe. On positions it as the go-to shoe for the bulk of your training, from easy recovery days to steady-state runs, with a focus on cushioning, comfort and durability rather than outright speed. At 295g (M US8.5) with a 35/29mm stack and 6mm drop, it is a substantial but energetic trainer aimed at runners who want soft cushioning that still rolls forward.
Full specs, fit notes, and reviews on the On Cloudmonster 3 wiki page.
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The On Cloudmonster 3 lasts about 600 km, estimated from its category and specs. Your own mileage shifts with body weight, running surface, and how you use the shoe.
Start checking for wear around 360 km (60% of its lifespan). By 480 km the foam and outsole are usually noticeably degraded, and most runners retire the shoe between there and 600 km.
Daily Trainer shoes in NORMA's database range from 320 to 800 km across 694 models. At 600 km, the On Cloudmonster 3 sits in the upper half of that range.
Often, yes. A pair with under 60% wear (roughly 360 km) still has real training life left. NORMA lists second-rotation running shoes with transparent, verified mileage so you know exactly how much life you're buying.